225443540 has 24 divisors (see below), whose sum is σ = 541064832. Its totient is φ = 77294880.

The previous prime is 225443527. The next prime is 225443549. The reversal of 225443540 is 45344522.

225443540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225443549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805016 + ... + 805295.

It is an arithmetic number, because the mean of its divisors is an integer number (22544368).

Almost surely, 2^225443540 is an apocalyptic number.

225443540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225443540 is an abundant number, since it is smaller than the sum of its proper divisors (315621292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225443540 is a wasteful number, since it uses less digits than its factorization.

225443540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610327 (or 1610325 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 225443540 is about 15014.7773876272. Note that the first 3 decimals coincide. The cubic root of 225443540 is about 608.6195964704.

The spelling of 225443540 in words is "two hundred twenty-five million, four hundred forty-three thousand, five hundred forty".